Question

What are the values of wavelengths of GaAs laser used in LBM?

(a) 100 – 200 nm

(b) 200 – 400 nm

(c) 600 – 700 nm

(d) 800 – 900 nm

This question was addressed to me in final exam.

I need to ask this question from Laser Beam Machining-Introduction in division Thermal Processes of Advanced Machining

Answer 1

Right option is (d) 800 – 900 nm

To elaborate: The wavelengths of GaAs laser used in LBM range from 800 – 900 nm.